05000272/LER-2077-044-03, Inoperability of Auto Stop Oil Pressure Switch

Inoperability of Auto Stop Oil Pressure Switch

ML19031B052
Person / Time
Site:	Salem
Issue date:	06/28/1977
From:	Librizzi F Public Service Electric & Gas Co
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1977-044-03
Download: ML19031B052 (4)

LER-2077-044, Inoperability of Auto Stop Oil Pressure Switch

Event date:
Report date:
2722077044R03 - NRC Website

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Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/622-7000 Mr. James P. O'Reilly Director of USNRC Off ice of Inspections and Enforcements Region 1 631 Park Avenue

- King of Prussia, Pennsylvania 19406

Dear Mr. O'Reilly:

June 28, 1977 LICENSE NO. DPR-70 DOCKET NO. 50-272

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REPORTABLE OCCURRENCE 77-44/03L Pursuant to the requirements of Salem Generating Station Unit No. 1 Technic"al Specifications, Section 6.9.1, we are submitting" Licensee "Event Report for Re.portable Occurrence 77-44/03L.

This report is required within thirty (30) days of the occurrence.

CC:

Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies)

Sincerely yours, F. P. Librizzi General Manager -

Electric Production

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The Energy People gr:; 2001 300M 1 a 2",

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Report Number:

Report Date:

Occurrence Date:

Facility:

77-44/03L 6/21/77 6/18/77 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Auto Stop Oil Pressure Switch PD-826C Inoperable CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 1, Reactor Power 43%

DESCRIPTION OF OCCURRENCE:

At 0815 hours0.00943 days <br />0.226 hours <br />0.00135 weeks <br />3.101075e-4 months <br />, PD-826C Turbine Auto Stop Oil Pressure Switch was declared inoperable due to the contact arm being bound at the pivot point.

Action Statement No. 7 for LCO 3.3.1.1 was implemented.

At 0835 hours0.00966 days <br />0.232 hours <br />0.00138 weeks <br />3.177175e-4 months <br />, instrumentation personnel had reworked the pressure switch and operability was confirmed.

Action Statement No. 7 for LCO 3. 3. 1.1 was then terminated *.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Binding of the contact arm at the pivot point caused the pressure switch to stick so that it would not have operated.

ANALYSIS OF OCCURRENCE:

Action Statement No. 7 for LCO 3.3.1.1 allows startup and/or power operation to continue until the next required functional test provided the inoperable switch is placed in the tripped condition within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

PD-826C Auto Stop Pressure Switch was reworked and returned to operable status within the one hour allowance, therefore, no. trip signal was inserted.

Technical Specification Action Statement for LCO 3.3.1.l was not violated.

At no time was there any danger to the health and safety of the general public or site personnel.

CORRECTIVE ACTION

The Auto Stop Oil Pressure* switch was disassembled, lubricated, and reassembled.

The contact arm was then exercised.

Testing confirmed operability.

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LER Report No. 77-~03L e 6/21/77 FAILURE DATA:

PD-826C TURBINE AUTO STOP OIL PRESSURE SWITCH Manufacturer:

Type:

Stock No.:

Range:

United Electric Controls Company Watertown, Mass.

J302 2-76 11106 270 0-200 psi/1.5-10 psid Prepared by_~~T_.~Sp.._e_n_c_er~~-

Manager - Sale 66-77 SORC Meeting No. --------

Station

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LICENSEE EVENT REPOR,.

LER 77~44/03L 6/21/77 CONTROL Bl.OCK LICENSEE NAME

@]!]IN IJ*I S !GI S 111 9

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6 LICENSE NUMBER Io Io 1--1 o I o Io I o I* o 1-1 o I OJ 1s 2

LICENSE TYPE 141 II II II 1Jo EVENT TV.PE REPORT REPORT CATEGORY TVl"E SOURCE OOCKET NUMBER EVENT CATE REPORT CATE IOl1l CON"TI I I llJ LLJ60' I I 0 I s I 0 I -1 0 I 21 71 21 I 0 I 6 111 s 17 I 7 I I 0 161 2 11 17 17J 1-""'i s1 sa 59

. 61 ea 69 74 75 EVENT OESCRIPTION

@IT] I During Mode 1 operation. PD826C Auto Stop Oil Pressure Switch was declared I 7

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@ID I inoperable.

Redundant switches PD454C and PD455C were operable *. The in-I 7

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@E] operable switch was disassembled and lubricated.

Testirig confirmed oper-7 8

@:ill !ability.

This is the first occurrence of this type.

77-44/03L 7

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8~9-------------------P-R-l-M-E-----------------------------80 SYSTEM

CAUSE

COMPONENT' COOE cooe:

COMPONENT COOE SUPPLIER

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8 9 10 11 12 17 43 CAUSE DESCRIPTION COMPONENT MANUFACTURER lul O 17 IS I 44 47 VIOLATION INJ 48

~!Binding of the contact arm at the pivot point caused the switch to stick *. I 80

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F*ACIL.ITV STATUS ITIT1

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'lloPOWER I 014 13 I 10 12 ACTIVITY CONTENT METHOOOF OTHE~ STATUS DISCOVERY

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13 44 45 DISCOVERY DESCRIPTION I Routine Inspection so REL.£ASEO OF REL.EASE AMOUNT OF ACTIVITY C!:EJ W

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PHONE: (609)365-7000 Ext. Salem 528